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https://www.readbyqxmd.com/read/28453760/long-term-inflammation-transforms-intestinal-epithelial-cells-of-colonic-organoids
#1
Shuji Hibiya, Kiichiro Tsuchiya, Ryohei Hayashi, Keita Fukushima, Nobukatsu Horita, Sho Watanabe, Tomoaki Shirasaki, Ryu Nishimura, Natsuko Kimura, Tatsunori Nishimura, Noriko Gotoh, Shigeru Oshima, Ryuichi Okamoto, Tetsuya Nakamura, Mamoru Watanabe
Background and Aims: Patients with ulcerative colitis [UC] are at an increased risk of developing colitis-associated cancer [CAC], suggesting that continuous inflammation in the colon promotes the transformation of colonic epithelial cells. However, the mechanisms underlying cell transformation in UC remain unknown. We therefore aimed to investigate the effect of long-term inflammation on intestinal epithelial cells [IECs] using organoid culture. Methods: IECs were isolated from mouse colon, and were cultured according to a method for a three-dimensional [3D] organoid culture...
May 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28453340/prospective-randomized-trial-comparing-the-efficacy-of-surgical-preparation-solutions-in-hand-surgery
#2
Peter Z Xu, John R Fowler, Robert J Goitz
BACKGROUND: Decontamination of the skin prior to incision is part of the standard of care for any surgical procedure. Previous studies have demonstrated variable efficacy of different surgical preparation solutions based on anatomic location. The purpose of this study is to determine the effectiveness of 3 commonly used surgical preparation solutions in eliminating bacteria from the skin prior to incision for common elective soft tissue hand procedures. METHODS: A total of 240 patients undergoing clean, elective, soft tissue hand surgery were prospectively randomized to 1 of 3 groups (ChloraPrep, DuraPrep, or Betadine)...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28449322/a-bacterium-with-close-genetic-identity-to-pseudomonas-mandelii-associated-with-spring-fish-kills-in-wild-bluegill-lepomis-macrochirus-rafinesque-and-pumpkinseed-sunfish-lepomis-gibbosus-linnaeus
#3
J Lovy, D Dicarlo-Emery, J M Hutcheson
Pseudomonas fluorescens are known bacterial pathogens in fish. The P. fluorescens group contains at least nine different bacterial species, although species from fish have rarely been differentiated. Two isolated fish kills affecting wild bluegills, Lepomis macrochirus Rafinesque, and pumpkinseed sunfish, Lepomis gibbosus (Linnaeus), occurred in the spring of 2015 during cool water temperatures (12.5°C-15.5°C). Disease signs included severe bacteraemia with rare gross external signs. Pure bacterial cultures isolated from kidneys of all affected fish were identified as P...
April 27, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28449226/an-integrated-network-analysis-identifies-how-arcab-enables-metabolic-oscillations-in-the-nitric-oxide-detoxification-network-of-escherichia-coli
#4
Sarah A Sacco, Kristin J Adolfsen, Mark P Brynildsen
The virulences of many pathogens depend on their abilities to detoxify the immune antimicrobial nitric oxide (NO•). The functions of bacterial NO• detoxification machinery depend on oxygen (O2 ), with O2 inhibiting some enzymes, whereas others use it as a substrate. Previously, Escherichia coli NO• detoxification was found to be highly attenuated under microaerobic conditions and metabolic oscillations were observed. The oscillations in [NO•] and [O2 ] were found to result from the inhibitory action of NO• on aerobic respiration, the catalytic inactivation of NO• by Hmp (an NO• dioxygenase), and an imbalanced competition for O2 between Hmp and cytochrome terminal oxidase activity...
April 27, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28449081/the-coxiella-burnetii-type-ivb-secretion-system-t4bss-component-dota-is-released-secreted-during-infection-of-host-cells-and-during-in-vitro-growth-in-a-t4bss-dependent-manner
#5
Brandon E Luedtke, Saugata Mahapatra, Erika I Lutter, Edward I Shaw
Coxiella burnetii is a Gram-negative intracellular pathogen and is the causative agent of the zoonotic disease Q-fever. To cause disease, C. burnetii requires a functional type IVB secretion system (T4BSS) to transfer effector proteins required for the establishment and maintenance of a membrane bound parasitophorous vacuole (PV) and further modulation of host cell process. However, it is not clear how the T4BSS interacts with the PV membrane since neither a secretion pilus nor an extracellular pore forming apparatus has not been described...
April 25, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28448892/role-of-procalcitonin-in-infected-diabetic-foot-ulcer
#6
Jung Ho Park, Dong Hun Suh, Hak Jun Kim, Yong In Lee, Il Hoon Kwak, Gi Won Choi
AIMS: Procalcitonin (PCT) has been recently accepted as a marker for diagnosing infection. The aim of the present study was to determine whether PCT levels are associated with infection severity of diabetic foot ulcers and whether PCT levels would be helpful to differentiate infected diabetic foot ulcer (IDFU) from IDFU associated with other infectious diseases (IDFU+O). METHODS: We prospectively included 123 diabetic patients hospitalized for IDFU. Infection severity of diabetic foot ulcers was graded according to the Infectious Diseases Society of America-International Working Group on the Diabetic Foot clinical classification of diabetic foot infection...
April 13, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28448543/heterologous-expression-of-a-thermophilic-diacylglycerol-acyltransferase-triggers-triglyceride-accumulation-in-escherichia-coli
#7
Beatriz Lázaro, Juan A Villa, Omar Santín, Matilde Cabezas, Cintia D F Milagre, Fernando de la Cruz, Gabriel Moncalián
Triglycerides (TAGs), the major storage molecules of metabolic energy and source of fatty acids, are produced as single cell oil by some oleogenic microorganisms. However, these microorganisms require strict culture conditions, show low carbon source flexibilities, lack efficient genetic modification tools and in some cases pose safety concerns. TAGs have essential applications such as behaving as a source for added-value fatty acids or giving rise to the production of biodiesel. Hence, new alternative methods are urgently required for obtaining these oils...
2017: PloS One
https://www.readbyqxmd.com/read/28448536/lateral-flow-immunoassay-for-on-site-detection-of-xanthomonas-arboricola-pv-pruni-in-symptomatic-field-samples
#8
Pablo López-Soriano, Patricia Noguera, María Teresa Gorris, Rosa Puchades, Ángel Maquieira, Ester Marco-Noales, María M López
Xanthomonas arboricola pv. pruni is a quarantine pathogen and the causal agent of the bacterial spot disease of stone fruits and almond, a major threat to Prunus species. Rapid and specific detection methods are essential to improve disease management, and therefore a prototype of a lateral flow immunoassay (LFIA) was designed for the detection of X. arboricola pv. pruni in symptomatic field samples. It was developed by producing polyclonal antibodies which were then combined with carbon nanoparticles and assembled on nitrocellulose strips...
2017: PloS One
https://www.readbyqxmd.com/read/28448019/a-tandem-liquid-chromatography-mass-spectrometry-based-approach-for-metabolite-analysis-of-staphylococcus-aureus
#9
David J Samuels, Zhe Wang, Kyu Y Rhee, Shaun R Brinsmade
In an effort to thwart bacterial pathogens, hosts often limit the availability of nutrients at the site of infection. This limitation can alter the abundances of key metabolites to which regulatory factors respond, adjusting cellular metabolism. In recent years, a number of proteins and RNA have emerged as important regulators of virulence gene expression. For example, the CodY protein responds to levels of branched-chain amino acids and GTP and is widely conserved in low G+C Gram-positive bacteria. As a global regulator in Staphylococcus aureus, CodY controls the expression of dozens of virulence and metabolic genes...
March 28, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28446905/okara-a-nutritionally-valuable-by-product-able-to-stabilize-lactobacillus-plantarum-during-freeze-drying-spray-drying-and-storage
#10
Gabriel Quintana, Esteban Gerbino, Andrea Gómez-Zavaglia
Okara is a nutritionally valuable by-product produced in large quantities as result of soymilk elaboration. This work proposes its use as both culture and dehydration medium during freeze-drying, spray-drying, and storage of Lactobacillus plantarum CIDCA 83114. Whole and defatted okara were employed as culture media for L. plantarum CIDCA 83114. The growth kinetics were followed by plate counting and compared with those of bacteria grown in MRS broth (control). No significant differences in plate counting were observed in the three media...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28446903/simulating-intestinal-growth-conditions-enhances-toxin-production-of-enteropathogenic-bacillus-cereus
#11
Nadja Jeßberger, Corinna Rademacher, Viktoria M Krey, Richard Dietrich, Ann-Katrin Mohr, Maria-Elisabeth Böhm, Siegfried Scherer, Monika Ehling-Schulz, Erwin Märtlbauer
Bacillus cereus is a ubiquitous bacterial pathogen increasingly reported to be the causative agent of foodborne infections and intoxications. Since the enterotoxins linked to the diarrheal form of food poising are foremost produced in the human intestine, the toxic potential of enteropathogenic B. cereus strains is difficult to predict from studies carried out under routine cultivation procedures. In this study, toxigenic properties of a panel of strains (n = 19) of diverse origin were compared using cell culture medium pre-incubated with CaCo-2 cells to mimic intestinal growth conditions...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28446677/variable-inhibition-of-zika-virus-replication-by-different-wolbachia-strains-in-mosquito-cell-cultures
#12
Michaela J Schultz, Sharon Isern, Scott F Michael, Ronald B Corley, John Connor, Horacio M Frydman
Mosquito-borne arboviruses are a major source of human disease. One strategy to reduce arbovirus disease is to reduce the mosquito's ability to transmit virus. Mosquito infection with bacterial endosymbiont, Wolbachia pipientis wMel, is a novel strategy to reduce Aedes mosquito competency for flavivirus infection. However, experiments investigating cyclic environmental temperatures have shown a reduction in maternal transmission of wMel potentially weakening the integration of this strain into a mosquito population relative to other Wolbachia strains...
April 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28446314/-changes-of-neutrophil-cd64-in-patients-with-hematological-mali-gnancies-combined-with-bacterial-infections
#13
Xin Dai, Jian-Ping Li, Wen-Qian Li, Jian-Ming Feng
OBJECTIVE: To explore the changes of CD64 on surface of neutrophils in patients with hematological malignancies combined with bacterial infections. METHODS: Ninety-seven patients with hematological tumor admitted in our hospital from August 2014 to February 2016 were selected and divided into 2 groups: infection group(50 cases) and noninfection group(47 cases) according to their symptoms, physical sings and blood culture results for microbiologic detection. The CD46 index on surface of neutrophils, serum C- reactive protein (CRP), neutrophil count (NC) and procalcitonin (PCT) level were detected by flow cytometry...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28446197/re-directing-bacterial-microcompartment-systems-to-enhance-recombinant-expression-of-lysis-protein-e-from-bacteriophage-%C3%AF-x174-in-escherichia-coli
#14
Mimi C Yung, Feliza A Bourguet, Timothy S Carpenter, Matthew A Coleman
BACKGROUND: Recombinant expression of toxic proteins remains a challenging problem. One potential method to shield toxicity and thus improve expression of these proteins is to encapsulate them within protein compartments to sequester them away from their targets. Many bacteria naturally produce so-called bacterial microcompartments (BMCs) in which enzymes comprising a biosynthetic pathway are encapsulated in a proteinaeous shell, which is in part thought to shield the cells from the toxicity of reaction intermediates...
April 26, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28445703/sensitivity-and-specificity-of-laser-scanning-in-vivo-confocal-microscopy-for-filamentous-fungal-keratitis-role-of-observer-experience
#15
Ahmad Kheirkhah, Zeba A Syed, Vannarut Satitpitakul, Sunali Goyal, Rodrigo Müller, Elmer Y Tu, Reza Dana
PURPOSE: To determine sensitivity and specificity of laser-scanning in vivo confocal microscopy (LS-IVCM) for detection of filamentous fungi in patients with microbial keratitis and to evaluate the effect of observer's imaging experience on these parameters. DESIGN: Retrospective, reliability study METHODS: This study included 21 patients with filamentous fungal keratitis and 24 patients with bacterial keratitis (as controls). The etiology of infection was confirmed based on the response to specific therapy regardless of culture results...
April 23, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28444712/the-urinary-microbiome-and-its-contribution-to-lower-urinary-tract-symptoms-ici-rs-2015
#16
REVIEW
Marcus J Drake, Nicola Morris, Apostolos Apostolidis, Mohammad S Rahnama'i, Julian R Marchesi
AIMS: The microbiome is the term used for the symbiotic microbial colonisation of healthy organs. Studies have found bacterial identifiers within voided urine which is apparently sterile on conventional laboratory culture, and accordingly there may be health and disease implications. METHODS: The International Consultation on Incontinence Research Society (ICI-RS) established a literature review and expert consensus discussion focussed on the increasing awareness of the urinary microbiome, and potential research priorities...
April 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28444360/role-of-early-onset-neutropenia-in-development-of-candidemia-in-premature-infants
#17
Nermin Ramy, Mohamed Hashim, Heba Abou Hussein, Happy Sawires, Maha Gaafar, Ayat El Maghraby
Background: The aim of the study was to assess the effect of early-onset neutropenia (EON) on the development of candidemia in premature infants and evaluate other risk factors. Materials and Methods: This prospective study was carried out in a neonatal intensive care unit of Cairo University Hospital. Fifty neutropenic premature infants were matched to 50 non-neutropenics. Subjects were then regrouped into candidemics and non-candidemics to study other risk factors such as central venous catheters, mechanical ventilation, parenteral nutrition, drugs as corticosteroids and others...
April 24, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28443679/emerging-roles-of-carbonyl-sulfide-cos-in-chemical-biology-sulfide-transporter-or-gasotransmitter
#18
Andrea K Steiger, Yu Zhao, Michael D Pluth
SIGNIFICANCE: Carbonyl sulfide (COS) is the most prevalent sulfur-containing gas in Earth's atmosphere and plays important roles in the global sulfur cycle. COS has been implicated in origin of life peptide ligation, is the primary energy source for certain bacteria, and has been detected in mammalian systems. Despite this long and intertwined history with terrestrial biology, limited attention has focused on potential roles of COS as a biological mediator. Recent Advances. Although bacterial COS production is well documented, definitive sources of mammalian COS production have not been confirmed...
April 26, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28443510/a-combination-of-egg-yolk-igy-and-phosvitin-inhibits-the-growth-of-enterotoxigenic-escherichia-coli-k88-and-k99
#19
Naiyana Gujral, Heejoo Yoo, Fatemeh Bamdad, Kwang Yong Lee, Joo-Won Suh, Hoon Sunwoo
BACKGROUND: Enterotoxigenic Escherichia coli (ETEC) is the main cause of fatal diarrhea in piglets during the first week of life and over the time of weaning. Pathogenesis of ETEC-causing diarrhea involves intestinal colonization mediated by fimbriae. Although, both IgY and egg yolk phosvitin (PV) possess antimicrobial activity, their combined activity has not been explored. A combination of IgY specific for ETEC and metal-chelating PV may show synergistic effect in reducing the growth of ETEC by inhibiting bacterial proliferation and stipulating protection against ETEC infection...
April 25, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28443295/data-for-discriminating-dead-live-bacteria-in-homogenous-cell-suspensions-and-the-effect-of-insoluble-substrates-on-turbidimetric-measurements
#20
Kwabena O Duedu, Christopher E French
Estimation of bacterial growth by rapid traditional methods such as spectrophometric measurements at 600 nm (OD600) is not applicable for cultures containing insoluble particles in the growth media. Colony counts are the only suitable alternative but these are laborious and not high-throughput. The data presented in this article is related to the research article entitled "Two-colour fluorescence fluorimetric analysis for direct quantification of bacteria and its application in monitoring bacterial growth in cellulose degradation systems" (Duedu and French, 2017) [1]...
June 2017: Data in Brief
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